arm64: dts: ti: k3-am64-main: Add ELM (Error Location Module) node

The ELM module is used for GPMC NAND accesses for detecting
and correcting errors during reads due to NAND bitflips errors.

4-, 8-, and 16-bit error-correction levels are supported using
the BCH (Bose-ChaudhurI-Hocquenghem) algorithm.

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
Link: https://lore.kernel.org/r/20220802104456.11069-3-rogerq@kernel.org